Feed mechanism for boring-machines.



A.'FREY. FEED MECHANISM FOR BORING MACHINES. APPLICATION FILED FEB. 12, 1908.

936, 1 1 O. Patented Oct. 5, 1909.

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WITNESSE B Q INVENTOH A. FREY. FEED MECHANISM FOR BOEING MACHINES.

APPLICATION FILED FEB. 12, 1908.

936,110. Patented Oct. 5, 1909.

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Patented oan. 5, mos.

Aejplication filed February 12, 1908-. Serial No. 415,494.

ehines using tubular boring tool through which water is passed into the bore hole.

The object of the invention is to provide a new and improved feed mechanism for Q; machines, capable of being quickly married for use' as a hand. feed er an automatic feed, and arranged to permt convenient changing of the gearing so that the vfeed mechanism for feeding the boring tool may be run at any red speed according to the nature of the 1U to be bored.

The invention consists oi novel features and parts and combi ations of the same, whieh will be mereiulty described hereinafter and then pointed out inthe ell-aims;

I i enetics]. embodiment of the invention is rep-resented in the accom anying drawings forming a part of this specification, in

wines similar characters of rei" Pence in-.

dieate' corresponding parts in the views.

Figure 1 is a plan view of the improvement; 2 is a cross section of the same on the. line -2--2 of Fig. 1; Fig. is a side elevation of the seine; Fig. 4' is a cross seotion of the same on the line 4 -4. of Fig. 1, and lilg. 5 is a longitudinal sectional elevation of the improi enient on tlie li'h'e 5 -5 of Ev Un a suitably constru'et'ed stand 1's journaled a transversely extending driven shaft :8 provided at one outer and with a wheel C adapted to be turned by hand or by power, to rotate the shaft B1 {in the driven shaft B is'secureol snilial gear wheel B (see Fig. 2) in mesh with a corresp g disg spiral gear wheel, fist'en'ed a key it to a' bush; in; inertia-led on the stand and haw-11g a key" is a ierlgitudina'l' key-way in a sleeve F pmvideaat it's front end with a collar F engaging the tubular busing tool G by Ine'an'sof a set anew f, so tlitit when the sliaft ro'titted rottiiy inbtion is' transmitted the said spiral; gen wheels D and E to the busting? aild the sleeve F, which latter in'tutn rotates tliebififing' tool (3 andwhen the sleeve'is thrived in dil tion ofits length, it carries the boring tool (i alon" and feeds itin'to the rock or other nrsiteria" to be drilled.

It is understood that by the arrangement describedthe sleeve F is free to slide in the bushing E but turns with the latter, and

by the spiral gear wheels D and E.

The forward end of the boring tool G is provided with the usual cutters G and the rear end of the said boring tool is connected with a water supply pipe for supplying water to the bore hole at the point of contact of the cutters G with the rock or other ma teri'al.

In order-to feed the boring tool G and its sleeve F in a longitudinal direction, the following arrangement is made: On the sleeve F screw the spaced nuts F F and against of the tubular Back I, held at its rear end on a reduced portion of the nut F (see Fig. 5) the nut being engaged by a look nut F is preferably interposed. between the head F a'nd'the nut F to reduce the friction between the said parts to a minimum. The tubular rack I is provided on top with longitu'c'l-inally=extendilig rack teeth I in mesh with a pinion J secured on a transversely- .extending' shaft K, mounted to turn in suit able bearings carried on the stand A. The shaft K is-a'd'apted to be rotated either by hand by the use of a ratchet lever L and a rateh'et wheel L, or the said shaft K is driyen slowly from the driven shaft B by a reducing gear presently to be described in detail. A gear Wheel K is mounted to slide on and to turn with the shaft K (see Fig. 1 ),and this gear wheel K is in mesh with a pinion N secured on a worm wheel shaft N extending transversely, and carrying a'worm wheel N in mesh with a Worm 0' connected with a longitudinallyextending worm shaft 0 carrying a worm wheel 0 in mesh with a worm P secured on the driven shaft B. Now when the latter is rotated; a rotary motion is transmitted by the worm P to the worm wheel 0 to rotate the worm shaft 0, which by the worm O and thrwor'm wheel N r0- tunes the shaft: N and th'e'latter by the pinion N meshing witli the gear wheel K rotates theshaft K. Now when the shaft K isi gi iitd thepinioh J is turned, and as the the bushing E is rotated from the shaft the nut abutsa head F having a re duced portion supportingthe forward end t0 hold it from turning. A ball bearing latter is in mesh with the rack teeth I, the

rack I is moved forward in the direction of its length, thus carrying the sleeve F along and the boring tool G rotated from the shaft B, as previously described. When it is desired to feed by hand, the gear wheel K is slipped to one side out of mesh with the pinion N, and then the operator operates the ratchet wheel L so as to rotate the shaft K' by hand, thus feeding the boring tool G forward, as desired.

It is understood that the shaft Kis ro-.

is interchanged for a larger 'or a smaller pinion. v Now in order to do this, the shafts O and N are journaled on a bracket Q, mounted to swing in a circular bearing Q, arranged on the stand A, the said circular bearing Q being concentric with the driven shaft B. Now by adjusting the bracket Q, larger or smaller pinions N can be placed on the shaft N, to mesh with the'gear wheel K, so that the speed of the shaft K is correspondingly increased or decreased, presuming that the shaft B is rotated at a uniform rate of speed. The rack teeth I ter minate a distance from the rear end of the rack I, as plainly indicated in Figs. 1 and 3, so that the forward feeding of the boring tool G comes to a standstill whenever the pinion J reaches the last tooth I .on the rack bar I. The sleeve F is then returned, so

as to brin the'rack teeth -I back to the starting point to allow feedin again of the boring, tool G in a forward irection.

From the foregoing it willbe seen that.

the boring tool G is rotated at a high rate of speed from the driven shaft B, and is fed forward slowly. corresponding to the nature of the rock or other material bored by the tool G, the feeding being controlled either by. hand, as above described, or from the forced into the boring tool G to thoroughly wash the bore hole and clear the bits or cutters G. .In case the boring tool G encounters acave, then the water naturally disappears from the bore hole as it passes into the cave. Now when this takes place the automatic feed can be immediately stopped and use made of the hand feed, so as to rapidly feed the. boring tool. G'through the cave to the other side thereof, after which the auto matic feed may be thrown into gear again y 1shifting the gear wheel K correspondmg y.

Whenever the worm P is slippedofi' the said sleeve for rotating the latter, a tubular shaft B, then the secondary shaft 0 can be turned'by hand, preferably by applying a hand crank on the said shaft at either. end. By this arrangement the shaft K can be turned to feed the rack I forward, and without requiring turning of the shaft K by the ratchet lever mechanism L, L.

Having thus described my invention, I claim as new and desire to secure by Letters Patent: I

l. A rock-boring machine having a sleeve on the boring tool, a driven shaft geared with the said sleeve for rotating the boringv tool, and a feed mechanism driven from the said ,shaft'and connected directly with the said sleeve for positively feeding'the latter and the boring tool on rotating the said driven shaft.

2. A rock-boring machine having'a sleeve on the 'boring tool for rotating and feeding the latter, a driven shaft geared with the said sleeve for rotating the latter, a tubular rack on the said-sleeve formoving the latter inthe direction of its length, and a gearing for actuating the said rack from the said driven shaft.-

3. A rock-boring machine having a sleeve on the boring tool for rotating and feeding the latter, a driven shaft'geared with the said sleeve for rotating the latter, a tubularrack on the said sleeve for moving the latter in the direction of its length, a transverse shaft carrying a pinion in mesh with the said rack, means for turning the said transverse shaft by hand, and a gearing connectmg the said driven shaft with the said transverse shaft for driving the latter from the driven shaft 4:. A rock-boring machine having a sleeve on the boring tool for rotating and feeding the latter, a driven shaft geared with the said sleeve for rotating the latter, a tubular rack on the said sleeve for moving the latter in the direction of its length, a transverse shaft carrying a pinion in mesh with the said rack, means for turning the said transverse shaft by hand, and a gearing connectingthe said driven shaft with thesaid transverse shaft for driving the latter from the driven shaft, t c said gearing having interchangeable gea wheels for varying the feed.

5. A rock-boring machine having a sleeve on the boring tool for rotating and feeding the latter, a driven shaft geared with the rack on the saidsleeve formoving the latter in the-direction of its length, a transverse shaft carrying a pinionin mesh with the' said rack, a shift-able gear wheel onthe saidtransverse shaft, and a gearing driven from the said driven shaft and adapted to mesh with the said .shiftable gear wheel.

6. A rock-boring machine havin a sleeve on the boring tool'for rotating an feeding the latter, a driven shaft geared with the said sleeve for rotating the latter, a tubular rack on the said sleeve for moving the latter in the direction of its length, a transverse shaft carrying a pinion in mesh with the said rack, a shiftable gear wheel on the said transverse shaft, a pinion adapted to mesh with the said shiftable gear wheel, a. Worm wheel having a shaftcarrying the said pinion, a worm shaft carrying a worm in mesh with .the said worm wheel, and a second worm wheel and worm, of'which the worm wheel is secured on the said worm shaft and the worm is secured on the said driven shaft.

7. A rock-boring machine having a sleeve on the boring tool for rotating and feeding the latter, a driven shaft geared with the said sleeve for rotating the latter, a tubular rack on the said sleeve for moving the latter in the directionof its length, a transverse shaft-carrying a pinion in mesh with the said rack, a shiftable gear. wheel on the said transverse shaft, a. pinion adapted to mesh with the said shiftable gear wheel, a worm wheel having a shaft carrying the said pinion, a worm shaft carrying a worm in mesh with the said worm wheel, a. second "Wm-in wheel and worm,of which the worm wheel is secured on the said worm shaft and the worm is secured on the said driven shaft,

and an adjustablebracket in which the said Worm shaft is mounted to turn.

8. A rock-boring machine having a sleeve on the boring tool for rotating and feeding the latter, a driven shaft geared with the said sleeve for rotating the latter,a tubular rack on the said sleeve for moving the latter in the direction of its length, a transverse shaft carrying a pinion in mesh with the said rack, a shiftable gear wheel on the said transverse shaft, a pinion adapted to mesh with the said shiftable gear wheel, a worm wheel having a shaft carrying the said pinion, a worm shaft carrying a worm in mesh with the said worm wheel, a second worm wheel and worm, of which the worm wheel is secured on the said worm shaft and the worm is secured on the said driven shaft, and an adjustable bracket in which the said worm shaft is mounted to turn, the said bracket having a circular bearing concentric with the said driven shaft.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ARTHUR FEE Y.

'Witnesses O. R. WHITAKER, C. Q. Scnmcmc'm. 

